A person who is ignorant and generally has no idea about anything.

An alternative term for idiot or moron. Usually used in the UK to describe someone who is incompetant or gormless. Taken from the name for the popular Jim Henson Puppets.

A right useless fuckwit.

a person who defies explanation with regard to common sense and logic, exhubing an air of confidence that is mutually exclusive to that of their accomplishments or ability

Someone who is useless until you shove your fist up them - Just like Kermit !

Mutant Undercover Pinko Puppet Espionage Team. Googly-eyed abominations created in Soviet laboratories to infiltrate and destroy America from the inside out. They disguise themselves as lovable puppets but actually want you to turn against the government. It is a fact that Kermit the Frog's arm-waving is actually a form of hypnotic brain washing that makes children want to burn U.S. flags and do heroin. Some of them live in the ghetto, particularly a slum called "Sesame Street", in which there lives a homosexual couple and a creature that lives in garbage, obviously an attempt to teach kids that homosexuality and living in poverty are OK. Sharing is also a dominant theme, proving that these creatures have strong communist values. The only logical response to these creatures is to burn every single Muppet toy you see.

It's not quite a mop, and it's not quite a puppet.
Characters created by Jim Henson, such as Kermit the frog, Miss Piggy, and Gonzo. Often appear on the PBS show Sesame Street.